Figure 1: Definition of prominent troughs on diagram. The width-depth value for the trough between the orange arrows is , which is more than 50% of . The two troughs between the pink arrows have -values less than 9.6786, but in combination their -value of 1.3138(69.5 − 61.5) = 10.5104 exceeds this cutoff, so that they are counted as one trough. Blue line: dominant component wave; black lines: subordinary component waves; red line: resultant interwaves.